Siemens 6ES7414-4HM14-0AB0 CPU 414-4H

High-Availability CPU for S7-400H and S7-400F/FH Systems

The 6ES7414-4HM14-0AB0 functions as the CPU 414-4H central processing unit for the SIMATIC S7-400H and S7-400F/FH automation platforms . This robust CPU powers redundant and fail-safe control systems, ensuring continuous operation even during component failures. It features four communication interfaces, including one MPI/DP port, one DP port, and two dedicated ports for synchronization modules . Consequently, this CPU serves as the ideal choice for high-availability applications like chemical processing, power generation, and water treatment.

Technical Specifications

The table below details the key technical parameters for the 6ES7414-4HM14-0AB0 CPU module.

Parameter	Specification
Manufacturer	Siemens
Product Type	Central Processing Unit (CPU 414-4H)
Series	SIMATIC S7-400H / S7-400F/FH
Hardware Product Version	1
Firmware Version	V4.5
Work Memory	2.8 MB total (1.4 MB program / 1.4 MB data)
Processing Speed (Bit Ops)	0.045 µs (typical)
Processing Speed (Float Ops)	0.135 µs (typical)
Interfaces	1x MPI/DP, 1x DP, 2x Sync Module Interfaces
Backplane Current Draw (5V DC)	1.4 A (typical) / 1.7 A (max)
Power Loss (Typical)	6 W
Dimensions (W x H x D)	50 mm x 290 mm x 219 mm
Weight	Approx. 0.995 kg
Battery Backup	Yes; retains all data
Programming Package	STEP 7 V5.3 SP2 or higher with HW update

Redundant Architecture and Performance

The 6ES7414-4HM14-0AB0 excels in dual-CPU configurations, providing seamless switchover during primary processor faults. The two synchronization module ports enable the fiber-optic coupling of two CPUs for active/standby redundancy . This design eliminates single points of failure, ensuring uninterrupted process control. Furthermore, the CPU supports up to 4095 DBs and 2048 FBs, offering substantial capacity for complex automation projects .

Lifecycle Status and Compatibility

Please note that Siemens has discontinued this CPU module as of February 2017, making it a spare part for legacy system maintenance . For critical redundancy, both CPUs must carry identical part numbers and the same firmware version . For new projects, we recommend using the successor model 6ES7414-5HM06-0AB0, which requires new synchronization modules (6ES7960-1AA06-0XA0) .